Explosive motor



EXILOS IVE MOTOR Filed Feb. l5, 1922 2 Sheets-Sheet l Patented Aug. 19,1924.

UNITED STATES HENRY BRIGGS, OF HASBROUCK HEIGHTS, NEW JERSEY.

MPLOSIVE MOTOR.

Application led February 13, 1922. Serial No. 536,080.

To all whom it may concern:

Be it known that I, HENRY Barcos, a citizen of the United States, and aresident of Hasbrouck Heights, in the county of Bergen I and State ofNew Jersey, have invented a new and Improved Explosive Motor, of whichthe following is a full, clear, and exact description.

The present invention relates to new and useful improvements in motors,and it pertains more articularly to motors of the internal com ustiontype.

It is one of the primary objects of the present invention to construct amotor in such a manner that the piston of the motor will hold itsposition at top dead center until the crank of the crank shaft haspassed over the top dead center point.

It is a further object of the invention to so construct the motor thatthe cylinder will be offset with respect to the crank in order that theforce of the explosion will be transmitted to the crank in a trueperpendicular line.

It is a further object of the invention to so construct the motor thatduring the last stages of compression of the charge within the cylinder,the resistance offered to the crank shaft instead of graduallyincreasing $0 will gradually decrease, thus requiring less power tocompress the charge than is necessary in internal combustion motors ofthe common type.

With the above and other objects in view,

' reference is had to the accompanying drawings, in whichA Figure 1 is avertical sectional view of a motor constructed inv accordance with lthepresent invention;

Fig. 2 is a diagrammatic view showing the position of the several partsat. the beginning of the compression stroke of the motor;

`Fig. 3 is a similar view showing the piston of the motor approachingtop dead center;

Fig. i is a similar view showing the piston and crank of the motor attop dead center;

Fig. 5 is a similar view showing the piston at top dead center, thecrank having passed over top dead center, said figure showing theposition of the. several parts at the time the charge under compressionis tired and the piston starts its power stroke.

Referring to the drawings and more particularly to Fig. 1, the referencecharacter designates the motor cylinder, and said motor cylinder isdivided into an upper chamber 11 and a lower chamber 12. The upperchamber 11 is provided with an exhaust port 13 and an intake port 14,said intake port communicating with the lower chamber 12 by means of aby-pass 15 in which is mounted a check valve 16 of any desired type.Leading into the by-pass is a fuel supply pipe 17, and mounted in saidfuel supply pipe 17 is a check valve 18.

The reference character 19 designates the piston and connected theretoas at 20, is a piston rod 21. The piston rod has rigidly secured to itslower end a block 22 and said block 22 is provided with a. cam slot 23.To provide for slidably mounting the block Q2 the crank case 24 of themotor is provided with guideways 25 in which the block 22 is slidablymounted as indicated by the reference character 26.

The reference character 27 designates the crank shaft and 28 designatesthe crank thereof. This crank Q8 carries a pin 29 and pivotally mountedon said pin Q9 is a block 30. The block 30 is substantially ellipticalin shape and is adapted to travel through the cam slot 23 oi the block22. The cam slot 23 in the block 22 is provided with a curved portion 31running into a curved portion 32 which terminates in a shoulder 32 fromwhich the wall 33 extends downwardly in approximately a straight line tothe end 34 of the slot. This curved portion 32 is concentric with thepath of travel of the crank of the crank shaft, which permits of travelof the crank without aiiecting movement of the piston. Opposite to thewall 33 the wall 35 ot the cam slot is straight in parallelism to thewall 33 thereof, and from a point 36 approximately opposite the shoulder32 the wall is curved as indicated by the reference character 37 to theopposite end 38 of the slot Q3.

The device functions in the following manner: e.

uring the operation of the motor when the several parts are in theposition shown in Fig. 2, the explosive charge enters the cylinder 11 bymeans oit the port 1l and the bypass l5, said charge having been forcedfrom the lower chamber 12 or" the cylinder lO upon the down stroke otthe piston 19. is the crank travels in the direction of the arrow A inFig. 2, the piston will be moved in the direction of the arrow B orinwardly of the cylinder 10 to the position shown in Fig. 3. In thisposition the piston 19 has approximately reached the height of thecompression stroke and the block 30 is beginning to ride the curvedsurface 31 of the cam slot 23. Owing to the curve of the portion 31 ofthe cam slot 23, the minimum resistance is offered to the crank shaft 27during the last stages of the compression stroke. Upon this up stroke ofthe piston a fresh charge isdrawn in through the fuel supply pipe 17 andthe by-pass 15 to the lower chamber 12 of the cylinder in order thatsaid charge may be passed through the by-pass 15 upon the next powerstroke of the piston to the chamber 11.

After the piston 19 reaches the height of compression stroke, in whichposition it is shown in Fig. et, the crank 28 is at top dead center andthe block 30 is riding the curved wall 32 of the cam slot 23. With theparts in this position the block 30 rides through the cam slot 23maintaining the piston 19 in the compression position until suchv timeas the block 30 passes over the shoulder 32 of the cam slot 23, whichshoulder may be any desired degree of the downward stroke of the crankon the right ascension and in which position the several parts are shownin Fig. 5. As the parts reach this position the charge in the cylinderis tired by a suitable ignition device 40 'and the force of saidexplosion is transmitted by means of the piston rod 21 to the crankshaft 27 through the medium of the -pin 29 and the, sliding block 30.Since this explosion takes place at the time the block 30 leaves theconcentric portion 32 and yenters the straight portion 33 of the camslot, the force of energy is received by the block riding from the thinedge of the wedge to the thick end of the Wedge, thus increasing thespeed of the crank over the speed of the piiston on the pistons downwardstrokes.

y such a construction it is apparent that the crank travels faster thanthe piston and this gives greater impetus to said crank.

As the piston travels downwardly on the power stroke, the chargepreviously taken in to the lower chamber 12 of cylinder 10 is forced byway of the by-pass to the upper chamber 11 ofthe cylinder 10 and theproducts of combustion are exhausted through the pipe 13, the incomingfresh charge serving to aid in the exhaust of the products of combustionby a displacement thereof common to this type of motor.

From the foregoing construction it is apparent that the presentinvention provides a new and iiiipioved i'oiin of internal coinvbustionengine in which the explosive charge power at a position when greaterleverage of the crank is had, thus increasing the power of the motor dueto the leverage position of the crank at the time of tiring of theexplosive charge. Furthermore, by the construction shown which permitsof a dwelling of the piston at the point of top dead center or fullcompression osition, the compression of the explosive c arge ismaintained at full compression during the time of tiring.

It will also be apparent that owing to the curvature of the wall 31 ofthe cam slot 23 at that time when the greatestl resistance is offered bythe compression of the explosive charge within the cylinder, i. e.,n-ear the end of the compression stroke, the resistance transmitted tothe crank shaft will be materially reduced owing to the fact that theblock 36 is riding this curve in such a manneras to produce a relativelyslow movement of the piston in the compression direction, said blockriding lfrom the thick edge of the wedge cam to the thin edge thereof.Furthermore, by'arranging the cylinder offset with respect to the crankcase, it will be seen that at the time of firing the explosive charge,the crank will be directly over the longitudinal center of the pistonand will thus remove side thrusts due to the angular disposition of thepiston and crank in the common type of motor.

I/Vhat is claimed is:

1. In a motor, a cylinder, a piston, a crank shaft, a connecting rod,and a cam-slotted block forming the connection between the connectingrod and the crank shaft, the cam slot in said block being so formed asto permit of rest of the piston during movement of the crank shaft.

2. In a motor, a cylinder, a piston, a crank shaft, a connecting rod,and a non-pivoted cam-slotted block forming the connection between theconnecting rod and the crank shaft, the cam slot in said block being soformed as to permit of rest of the piston during movement of the crankshaft.

3. In an internal combustion motor, a cylinder, a piston movabletherein, a crank shaft, a block carried by the crank shaft, and acam-slotted block carried by the piston and receiving the block carriedby the cam shaft, the slot in said cam-slotted block having a portionformed concentric with the path of travel of the crank shaft, as and forthe purpose set forth.

4. In an interna-l combustion motor, a piston, a connecting rod securedthereto, a crank shaft, and means for causing the piston to dwell at thetop of the cylinder until the crank shaft passes over top dead center,said means comprising a sliding block having a cam slot therein, aportion of which slot describes an arc concentric with the path oftravel of the motor crank shaft.

5. In an internal combustion motor, a block carried by the motor .crankshaft and a second block having a cam slot therein and adapted toreceive the block of the crank shaft, the cam slot in saidsecond-mentioned block being formed with a portion eccentric to the pathof travel of the crank of the crank shaft, a portion concentric to thepath of travel of the crank of the crankshaft, and a straight runningportion eccentric to the path of travel of the crank of said crankshaft.

6. In an internal combustion motor, a cylinder, a piston, a crank shaft,a piston rod secured to said piston, and a block carried by said pistonrod and having a cam slot for receiving the crank shaft, a portion ofwhich cam slot is concentric to the path of travel of the crank of thecrank shaft whereby the piston is brought to rest and maintainedstationary While the crank of the crank shaft passes through theconcentric portion of the cam slot.

7. In an internal combustion motor, a block carried by the motor crankshaft and a second block having a cam slot therein and adapted toreceive the block carried by the motor crank shaft, the cam slot in saidsecond mentioned block being formed with a lifting portion, an idleportion, and an eccentric angle straight running portion.

8. In an internal combustion motor, a block carried by the motor crankshaft and a second block having a cam Slot therein and adapted toreceive the block carried by the motor crank. shaft, the cam slot insaid second-mentioned block being formed with a lifting portion, aneccentric angle straight running portion, and an idle portionintervening between said lifting portion and said eccentric angleStraight running portion.

9. In an internal combustion motor, a traveler block carried by themotor crank shaft, a cam-slotted block the cam slot of which has aportion concentric to the path of travel of the motor crank shaft, saidconcentric portion merging into a portion eccentric to the path oftravel of the motor crank shaft, and means for connecting said camslotted block to the piston of said motor, said means comprising a rodsecured to the piston and to the cam-slotted block at a point over thepoint where the concentric portion of said cam slot merges into saideccentric portion thereof.

10. In a motor and in combination with the crank shaft thereof, acam-slotted block, the slot of said cam-slotted block having a liftingportion, an idle portion, and a power portion, said power portion beinga continuation of the idle portion.

11. In a motor, and in combination with the crank shaft thereof, acam-slotted block, the slot in said cam slotted block beingt formed witha lifting portion, a power portion, and an idle portion inter sed withrespect to the lifting portion an the power portion.

12. In a motor, and in combination with the crank shaft thereof, a camslotted block, the slot in said cam slotted block being formed with alifting portion, a power portion, and an idle portion interposed withrespect to the lifting portion and the power portion, said idle portionbeing concentric with the'path of travel of the crank of the crank shaftthroughout its length.

HENRY BRIGGS.

